SecurityException

I need to access an external website with the WWW class. This worked fine until recently, but now in Unity 3.0.0f5 I get these error messages:

SecurityException: No valid crossdomain policy available to allow access
UnityEngine.WWW.get_text ()

Reading the WWW documentation it says:

I get the message when running my game in the Editor as well.

How can I bypass this? Or can I switch it off? If not, my whole project has suddenly become useless. I have been working on it for months. It’s whole purpose is to display webpages inside a game-like world.

Oh, never mind.
I found a documentation page on the security sandbox.
Apparently I need a crossdomain.xml file hosted on the domain I want to access.

That still sucks, because I don’t see the harm in requesting a webpage from a random domain, but ok. It will work in my case, although I totaly fail to see the point of this new feature.